I. Introduction
Early Christology
Initial Problems
Justin Martyr, Melito of Sardis, Irenaeus of Lyon, Tertullian of Carthage, Origen of Alexandria
Further Problems
The Arians and Athanasius; Apollinaris of Laodicea; Theodore of Mopsuestia; Cyril, Nestorius, and Eutyches; Leo and Chalcedon

II. Melito of Sardis
A Homily on the Passover

III. Irenaeus of Lyon
Against Heresies

IV. Tertullian
Against Praxeas
On the Flesh of Christ

V. Origen
On First Principles

VI. Athanasius
Orations against the Arians

VII. Apollinaris of Laodicea
On the Union in Christ of the Body with the Godhead
Fragments

VIII. Theodore of Mopsuestia
Fragments of the Doctrinal Works

IX. The Controversies Leading Up to the Council of Chalcedon
Nestorius's First Sermon against the Theotokos
Cyril of Alexandria's Second Letter to Nestorius
Nestorius's Second Letter to Cyril
Cyril's Letter to John of Antioch
Pope Leo I's Letter to Flavian of Constantinople
The Council of Chalcedon's "Definition of the Faith"